JP3176488B2 - Driving force transmission device for paper feed roller - Google Patents
Driving force transmission device for paper feed rollerInfo
- Publication number
- JP3176488B2 JP3176488B2 JP19957693A JP19957693A JP3176488B2 JP 3176488 B2 JP3176488 B2 JP 3176488B2 JP 19957693 A JP19957693 A JP 19957693A JP 19957693 A JP19957693 A JP 19957693A JP 3176488 B2 JP3176488 B2 JP 3176488B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- power transmission
- driving force
- unit
- feed roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機、ファクシミリ
等の給紙部における給紙ローラに駆動力を伝達する、給
紙ローラの駆動力伝達装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving force transmitting device for a sheet feeding roller for transmitting a driving force to a sheet feeding roller in a sheet feeding section of a copying machine, a facsimile or the like.
【０００２】[0002]
【従来の技術】図８は給紙部における用紙送り時の不具
合を説明するための模式図である。2. Description of the Related Art FIG. 8 is a schematic view for explaining a problem in feeding a sheet in a sheet feeding section.
【０００３】図において、１はピックアップローラ、２
はこのピックアップローラ１の下流側近傍に設けられた
フィードローラ、３はフィードローラ２と当接し、用紙
を１枚ずつに捌く分離パッドである。また、Ｐは下側の
用紙Ｐ1 から順に給紙される用紙束である。In the drawing, reference numeral 1 denotes a pickup roller, 2
Reference numeral 3 denotes a feed roller provided near the downstream side of the pickup roller 1, and 3 denotes a separation pad which comes into contact with the feed roller 2 and separates sheets one by one. Moreover, P is a bundle of sheets is fed from the sheet P 1 in the lower side.
【０００４】この図に示すように、給紙されようとする
用紙Ｐ1 の後端がピックアップローラ１を離れて直ぐに
次の用紙を送り出そうとすると、フィードローラ２と分
離パッド３からなる分離部で用紙同士が重なって、用紙
束Ｐにループが形成されてしまいスムーズに用紙分離が
行われなくなる。As shown in FIG. 1 , when the trailing end of the sheet P1 to be fed immediately tries to send out the next sheet after leaving the pickup roller 1, the separation made up of the feed roller 2 and the separation pad 3 is performed. The sheets overlap each other in the portion, and a loop is formed in the sheet bundle P, so that the sheet is not smoothly separated.
【０００５】そこで、給紙ローラにスプリングクラッチ
を用い、このスプリングクラッチを空転させることで送
り出される用紙に適宜の給紙間隔を設定する技術が特公
平３−４４９７８号公報に開示されている。Japanese Patent Publication No. 3-44978 discloses a technique in which a spring clutch is used as a paper feed roller and an appropriate paper feed interval is set for the paper to be fed by idling the spring clutch.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来技術においては、スプリングクラッチ空転時に空転負
荷が大きく、また、スプリングへの給油が不可欠なた
め、組立てが困難でありコストが高いという欠点があっ
た。However, in the above-mentioned prior art, there is a drawback that the idling load is large when the spring clutch is idling, and that lubrication of the spring is indispensable, so that assembly is difficult and cost is high. .
【０００７】本発明は、上記従来技術の欠点を解消し、
連続的に正確な給紙、搬送動作を行うことができる給紙
ローラの駆動力伝達装置を提供することを目的とするも
のである。The present invention solves the above-mentioned disadvantages of the prior art,
An object of the present invention is to provide a driving force transmission device for a sheet feeding roller capable of continuously performing accurate sheet feeding and conveying operations.
【０００８】[0008]
【課題を解決するための手段】上記目的は、給紙ローラ
に対して給紙駆動力を伝達する給紙ローラの駆動力伝達
装置において、駆動側から動力を伝達されて回転する動
力入力部と、この動力入力部と同一軸線上に当該軸線を
中心として回動自在、かつ、前記軸線方向に移動自在に
配置され、前記動力入力部の回転駆動力を動力伝達方向
下流側に伝達する動力伝達部と、前記軸線上に配置さ
れ、前記動力伝達部から伝達された駆動力を前記給紙ロ
ーラ側に出力する動力出力部と、前記動力入力部と前記
動力伝達部との間に設けられ、前記動力入力部の駆動方
向の回転速度が前記動力伝達部の回転速度よりも大きい
ときには、前記動力入力部の回転駆動力を前記動力伝達
部に伝達して前記動力伝達部を前記動力入力部と同速度
で回転させるとともに、前記動力伝達部を接触圧により
前記動力出力部側に移動させる第１のカム手段と、前記
動力伝達部と前記動力出力部との間に設けられ、前記動
力伝達部の回転速度が前記動力出力部の回転速度よりも
大きいときには、前記動力伝達部の回転駆動力を前記動
力出力部に伝達し、前記動力出力部の回転速度が前記動
力伝達部の回転速度よりも大きいときには、前記動力伝
達部を接触圧により前記動力入力部側に移動させて前記
動力出力部から離脱させる第２のカム手段とを備え、前
記動力入力部、前記動力伝達部および前記動力出力部の
３部材で動力の伝達および伝達解除を行うことによって
達成される。SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper feed roller driving force transmitting device for transmitting a paper feed driving force to a paper feed roller, wherein a power input portion which receives power from the drive side and rotates. , On the same axis as the power input
Rotatable as the center and movable in the axial direction
Is arranged, it is arranged a rotational driving force of the power input unit and a power transmission unit for transmitting to the power transmission direction downstream side, in the axis
It is the a power output unit of the driving force transmitted from the power transmission unit to output to the feed roller side, provided between the power input portion and the <br/> power transmission unit, the power input unit when the rotational speed of the driving direction is larger than the rotational speed of the power transmitting portion of the rotation of said power transmission portion to transmit the rotational driving force of the power input unit to the power transmission portion by the power input unit and the same speed together it is, by contact pressure of the power transmission unit
A first cam means for moving the power output side, provided between the power transmission unit and the power output unit, the rotational speed of the dynamic <br/> force transmitting portion of said power output section when greater than speed, transmits the rotation driving force of the power transmission unit to the dynamic <br/> force output section, than the rotational speed of the rotary speed of the power output section is the dynamic <br/> force transmitting portion when large, and a second cam means for disengaging from the moved the <br/> power output portion by the contact pressure of the power transmission unit to the power input side, front
The power input unit, the power transmission unit and the power output unit
This is achieved by transmitting and releasing power with three members .
【０００９】この場合、第１のカム手段を、前記動力入
力部の外周部に形成された突部と、この突部が係合する
前記動力伝達部の端部に形成された溝部とから構成し、
この溝部としては、動力伝達時には前記突部が回転方向
下流側の面に当接し、非伝達時には回転方向上流側の面
に退避するような形状に形成するとよい。また、第２の
カム手段を、前記動力伝達部の反動力入力部側の端面に
形成された突部と、この突部が係合する前記動力出力部
の端部に形成された溝部とから構成し、前記突部と前記
溝部とが、前記動力伝達部によって動力伝達が行われる
ときに係合し、前記動力出力部の回転速度が前記動力伝
達部の回転速度よりも大きく、前記動力出力部が空転す
るときには係合関係を解除するような形状に形成すると
よい。なお、給紙ローラは、給紙部に積載された用紙を
呼び出すピックアップローラおよびこのピックアップロ
ーラの下流側近傍に設けられたフィードローラのいずれ
かに設定することができる。[0009] In this case, the first cam means, and the projection formed on the outer periphery of said power input section, the projection is engaged
Consisted groove portion formed in an end portion of the power transmission unit,
The groove may be formed in such a shape that the projection comes into contact with the surface on the downstream side in the rotational direction when power is transmitted and retreats on the surface on the upstream side in the rotational direction when power is not transmitted. Further, the second cam means, from the a projection formed on the end surface of the recoil force input portion of the power transmission portion, the projecting portion is formed at an end portion of the power output unit that engages groove portion configured, and said projection said <br/> groove engages when the power transmission is performed by the power transmission unit, larger than the rotational speed of the rotary speed of the power output section is the power transmission unit It is preferable to form the power output portion into a shape that releases the engagement when the power output portion idles. Note that the paper feed roller can be set to one of a pickup roller that calls up the paper stacked in the paper feed unit and a feed roller provided near the downstream side of the pickup roller.
【００１０】[0010]
【作用】駆動源からの駆動力により動力入力部が回転す
ると、第１のカム手段により動力伝達部が回転するとと
もに動力伝達部が動力出力部側に移動する。これにより
第２のカム手段が噛み合って動力出力部に動力入力部か
らの回転が伝達され、給紙ローラが回転する。When the power input section is rotated by the driving force from the drive source, the first cam means rotates the power transmission section and moves the power transmission section to the power output section. As a result, the second cam means are engaged with each other, and rotation from the power input unit is transmitted to the power output unit, and the paper feed roller rotates.
【００１１】一方、この給紙ローラの線速に対して送り
出された用紙がくわえ込まれる下流側に隣接する他のロ
ーラ（動力出力部と一体的な給紙ローラが呼び出しロー
ラの場合はフィードローラ、動力出力部と一体的な給紙
ローラがフィードローラの場合はさらにその下流側の、
例えば読み取りローラなどのローラ）の線速を速くして
おけば、給紙ローラの動力出力部は用紙により引っ張ら
れて動力出力部の回転速度の方が動力伝達部の回転速度
よりも大きくなる。そして、このように大きくなると第
２のカム手段によって動力伝達部は動力入力部側に移動
し、動力伝達部は動力出力部から離脱して動力出力部は
空転する。これにより図８に示す不具合は解消される。On the other hand, another roller adjacent to the downstream side where the sheet fed out with respect to the linear velocity of the sheet feeding roller is added (if the sheet feeding roller integrated with the power output section is a call roller, the feed roller If the paper feed roller integrated with the power output unit is a feed roller, it is further downstream thereof.
If the linear velocity of a roller (for example, a reading roller) is increased, the power output unit of the paper feed roller is pulled by the paper, and the rotation speed of the power output unit is higher than the rotation speed of the power transmission unit. Then, when the power transmission portion becomes larger, the power transmission portion is moved to the power input portion side by the second cam means, the power transmission portion is separated from the power output portion, and the power output portion idles. This eliminates the problem shown in FIG.
【００１２】[0012]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１は実施例に係る給紙ローラの駆動力伝
達装置の分解斜視図である。FIG. 1 is an exploded perspective view of a driving force transmitting device for a sheet feeding roller according to an embodiment.
【００１４】図において、１０は図示しない駆動源から
の駆動力を直に受ける動力入力部、２０は動力入力部１
０からの駆動力が伝達される動力伝達部、３０は動力伝
達部２０から伝達された駆動力を一体的に設けられた給
紙ローラに出力する動力出力部である。In FIG. 1, reference numeral 10 denotes a power input unit which directly receives a driving force from a driving source (not shown), and 20 denotes a power input unit.
A power transmission unit 30 to which a driving force from 0 is transmitted is a power output unit that outputs the driving force transmitted from the power transmission unit 20 to a sheet feed roller provided integrally.
【００１５】動力入力部１０は、鍔部１１と、円柱部１
２と、鍔部１１から円柱部１２の外周の軸方向に突設さ
れた突起部１３とを有している。The power input unit 10 includes a flange 11 and a column 1
2 and a projection 13 protruding from the flange 11 in the axial direction on the outer periphery of the column 12.
【００１６】動力伝達部２０は、円柱部１２に遊嵌され
る環状に形成されており、動力入力部１０側の外周端の
１か所に係合溝２１が設けてある。この係合溝２１は突
起部１３と係合するためのものであり、環状の動力伝達
部２０の軸線と平行な駆動伝達面２１ａおよびこれと対
向する対向面２１ｂさらには突起部１３の先端と当接す
るテーパ面２１ｃとからなっており、駆動伝達面２１ａ
と対向面２１ｂの間隔は突起部１３の幅より充分大きな
ものとなっている。また、係合溝２１の反対側の端面に
はテーパ部を有する係止爪２２が突設されている。な
お、この図では係止爪２２は１個のみ形成されている
が、後述する図４、図５に示すように、２個設けてもよ
くあるいはそれ以上であってもよい。The power transmission portion 20 is formed in an annular shape to be loosely fitted to the column portion 12, and has an engagement groove 21 at one position on the outer peripheral end on the power input portion 10 side. The engagement groove 21 is for engaging with the projection 13, and is provided with a drive transmission surface 21 a parallel to the axis of the annular power transmission unit 20, an opposing surface 21 b opposed thereto, and a tip of the projection 13. The drive transmission surface 21a
And the distance between the opposing surface 21b is sufficiently larger than the width of the protrusion 13. In addition, a locking claw 22 having a tapered portion protrudes from an end surface on the opposite side of the engagement groove 21. In this figure, only one locking claw 22 is formed. However, as shown in FIGS. 4 and 5 described later, two locking claws 22 may be provided or more.
【００１７】動力出力部３０は、係止爪２２と緊密に係
合するように係止爪２２と平行なテーパ部を有するラチ
ェット溝３１を有している。なお、この実施例において
は、突起部１３と係合溝２１とが第１のカム手段を、係
止爪２２とラチェット溝３１とが第２のカム手段をそれ
ぞれ構成している。The power output portion 30 has a ratchet groove 31 having a tapered portion parallel to the locking claw 22 so as to closely engage with the locking claw 22. In this embodiment, the projection 13 and the engaging groove 21 constitute the first cam means, and the locking pawl 22 and the ratchet groove 31 constitute the second cam means.
【００１８】図２は駆動力伝達装置における駆動力伝達
時の状態を示す模式図、図３は同動力出力部が空転時の
状態を示す模式図である。図２に示すように、動力入力
部１０が駆動源からの駆動力により矢印方向に回転する
と、突起部１３と、係合溝２１のテーパ面２１ｃの摺動
により、動力伝達部２０は動力出力部３０側に移動し、
係止爪２２とラチェット溝３１がかみ合う。そして、突
起部１３が駆動伝達面２１ａと当接することで、駆動力
が動力伝達部２０に伝達される。従って、動力伝達部２
０を介してこの駆動力は動力出力部３０にも伝達される
ことになり、動力出力部３０も動力入力部１０と同様に
図の矢印方向に回転することになる。FIG. 2 is a schematic diagram showing a state when the driving force is transmitted by the driving force transmitting device, and FIG. 3 is a schematic diagram showing a state when the power output unit is idling. As shown in FIG. 2, when the power input unit 10 rotates in the direction of the arrow due to the driving force from the drive source, the power transmission unit 20 is driven by the sliding of the protrusion 13 and the tapered surface 21 c of the engagement groove 21. Move to the part 30 side,
The locking claw 22 and the ratchet groove 31 are engaged. Then, the driving force is transmitted to the power transmission unit 20 by the projection 13 contacting the drive transmission surface 21a. Therefore, the power transmission unit 2
This driving force is also transmitted to the power output unit 30 via 0, and the power output unit 30 is also rotated in the direction of the arrow in the figure, similarly to the power input unit 10.
【００１９】一方、後述するように用紙に引っ張られる
ことで動力出力部３０が図３に示すように矢印方向に空
転すると、ラチェット溝３１と係止爪２２の係合が外
れ、係止爪２２のテーパ部が動力出力部３０の端面に乗
り上げる形になるので、動力伝達部２０は右側に移動す
る。これによって駆動力は動力出力部３０には伝達され
なくなる。また、動力伝達部２０も動力出力部３０との
当接部における摩擦力により、動力入力部１０より速い
線速で回転し、対向面２１ｂと突起部１３が当接した時
点で、動力出力部３０とは、動力入力部１０の線速と動
力出力部３０の空転時の線速の差を以て摺動することに
なる。On the other hand, when the power output unit 30 is idled in the direction of the arrow as shown in FIG. 3 by being pulled by the paper as described later, the engagement between the ratchet groove 31 and the locking claw 22 is released, and the locking claw 22 is disengaged. The power transmission unit 20 moves to the right because the tapered portion of the power transmission unit 30 rides on the end face of the power output unit 30. As a result, the driving force is not transmitted to the power output unit 30. Also, the power transmission unit 20 rotates at a linear velocity higher than that of the power input unit 10 due to the frictional force at the contact portion with the power output unit 30, and when the opposing surface 21 b and the protrusion 13 contact each other, the power output unit 30 means that the sliding occurs based on the difference between the linear speed of the power input unit 10 and the linear speed of the power output unit 30 during idling.
【００２０】図４はピックアップローラの駆動力伝達装
置の分解斜視図で、動力出力部３０の外周にゴムを巻き
付けたピックアップローラ１を、本発明の対象となる給
紙ローラとした例である。FIG. 4 is an exploded perspective view of a driving force transmission device for the pickup roller, in which the pickup roller 1 in which rubber is wound around the outer periphery of the power output unit 30 is used as a paper feed roller to which the present invention is applied.
【００２１】図５はピックアップローラの駆動力伝達装
置の変形例を示す分解斜視図で、動力入力部１０の先端
に突出形成された軸１４が動力出力部３０に嵌合し、動
力出力部３０はこれにより支持されるようになってい
る。また、Ｖ5 （ラジアン／秒）は動力入力部１０の線
速を示し、θ（ｒａｄ）は動力伝達部２０の係合溝２１
の開口角度を示している。FIG. 5 is an exploded perspective view showing a modified example of the driving force transmitting device for the pickup roller. The shaft 14 formed at the tip of the power input portion 10 is fitted to the power output portion 30 and the power output portion 30 is provided. Is supported by this. V 5 (radian / second) indicates the linear velocity of the power input unit 10, and θ (rad) indicates the engagement groove 21 of the power transmission unit 20.
Are shown.
【００２２】図６は駆動力伝達装置と一体のピックアッ
プローラを用いた給紙搬送装置の概念図で、図におい
て、４，６は読み取りローラ、５，７は各読み取りロー
ラ４，６に圧接される加圧ローラ、８，９は読み取りセ
ンサである。また、Ｖ1 〜Ｖ4（ｍｍ／秒）は各ローラ
の線速、Ｆ1 〜Ｆ4 は各部の摩擦係数、Ｌ（ｍｍ）はピ
ックアップローラ１の中心からフィードローラ２の中心
までの距離を示している。FIG. 6 is a conceptual diagram of a sheet feeding and conveying device using a pickup roller integrated with a driving force transmitting device. In the drawing, reference numerals 4 and 6 denote reading rollers, and reference numerals 5 and 7 depress against the reading rollers 4 and 6, respectively. The pressure rollers 8 and 9 are reading sensors. V 1 to V 4 (mm / sec) are the linear velocities of the rollers, F 1 to F 4 are the friction coefficients of the respective parts, and L (mm) is the distance from the center of the pickup roller 1 to the center of the feed roller 2. Is shown.
【００２３】ここで、 Ｖ1 ＜Ｖ2 ＜Ｖ3 ≒Ｖ4 Ｆ1 ＜Ｆ2 ＜Ｆ3 ≒Ｆ4 であり、また、１枚目の用紙の後端がピックアップロー
ラ１を離れ、かつ、フィードローラ２を離れるまでの
間、ピックアップローラ１が回転しない（停止する）よ
うに、 Ｌ／Ｖ2 ＜θ／Ｖ5 となることを示している。Here, V 1 <V 2 <V 3 ≒ V 4 F 1 <F 2 <F 3 ≒ F 4 , and the rear end of the first sheet leaves the pickup roller 1 and L / V 2 <θ / V 5 so that the pickup roller 1 does not rotate (stops) until the feed roller 2 leaves.
【００２４】これにより１枚目の用紙の後端がピックア
ップローラを通り過ぎた後、２枚目の用紙は直ぐにはフ
ィードローラ２に搬送されなくなり、前述した不具合を
解消できる。Thus, after the trailing end of the first sheet has passed the pickup roller, the second sheet is not immediately conveyed to the feed roller 2, so that the above-mentioned problem can be solved.
【００２５】図７は本発明に係る駆動力伝達装置をピッ
クアップローラに適用した場合の用紙の給紙搬送の過程
を示す説明図である。FIG. 7 is an explanatory view showing a process of feeding and conveying a sheet when the driving force transmission device according to the present invention is applied to a pickup roller.
【００２６】（ａ）用紙束Ｐはピックアップローラ１の
回転によりフィードローラ２と分離パッド３からなる分
離部に搬送される。(A) The sheet bundle P is conveyed to a separation section including the feed roller 2 and the separation pad 3 by the rotation of the pickup roller 1.
【００２７】（ｂ）最下位の用紙Ｐ1 が捌かれて、ピッ
クアップローラ１より速い速度のフィードローラ２の速
度にて送られ始める。(B) The lowermost sheet P 1 is separated and starts to be fed at a speed of the feed roller 2 higher than the speed of the pickup roller 1.
【００２８】（ｃ），（ｄ）ピックアップローラ１はフ
ィードローラ２の速度で搬送される用紙Ｐ1 に連れ回
り、前述したように空転する。[0028] (c), (d) the pickup roller 1 turns with the sheet P 1 conveyed at a speed of the feed rollers 2, idles as described above.
【００２９】（ｅ）用紙Ｐ1 の後端がピックアップロー
ラ１から離れると、ピックアップローラ１の空転は停止
し、動力入力部１０の突起部１３が駆動伝達面２１ａに
当接するまでの時間経過後、再び動力出力部３０に駆動
力が伝達されることになる。言い換えると、所定の給紙
間隔を以て次の用紙が送り出されることになる。[0029] When the (e) the trailing end of the sheet P 1 is separated from the pickup roller 1, idling of the pickup roller 1 is stopped, after the lapse of time until the projection 13 of the power input unit 10 comes into contact with the drive transmission surface 21a Then, the driving force is transmitted to the power output unit 30 again. In other words, the next sheet is sent out at a predetermined sheet feeding interval.
【００３０】なお、本発明の駆動力伝達装置をフィード
ローラ２にも適用できることはいうまでもない。この場
合は読み取り位置の先端、後端を検知するための頁間の
隙間を発生させることができる。It goes without saying that the driving force transmission device of the present invention can be applied to the feed roller 2 as well. In this case, a gap between pages for detecting the leading end and the trailing end of the reading position can be generated.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
動力入力部と動力伝達部との間に第１のカム手段を、ま
た、動力伝達部と動力出力部との間に第２のカム手段を
それぞれ設け、動力伝達部の移動により動力の伝達と給
紙ローラの空転を可能とし、これによって給紙間隔を設
定することができるので、信頼性の高い給紙、搬送動作
を行わせることができる。As described above, according to the present invention,
A first cam unit is provided between the power input unit and the power transmission unit, and a second cam unit is provided between the power transmission unit and the power output unit. Since the paper feed roller can be idled and the paper feed interval can be set by this, highly reliable paper feed and transport operations can be performed.
【図１】本発明の実施例に係る給紙ローラの駆動力伝達
装置の分解斜視図である。FIG. 1 is an exploded perspective view of a driving force transmitting device for a sheet feeding roller according to an embodiment of the present invention.
【図２】駆動力伝達装置における駆動力伝達時の状態を
示す模式図である。FIG. 2 is a schematic diagram showing a state when driving force is transmitted in the driving force transmission device.
【図３】駆動力伝達装置における動力出力部が空転時の
状態を示す模式図である。FIG. 3 is a schematic diagram illustrating a state where a power output unit in the driving force transmission device is idling.
【図４】ピックアップローラの駆動力伝達装置の分解斜
視図である。FIG. 4 is an exploded perspective view of a driving force transmission device for a pickup roller.
【図５】ピックアップローラの駆動力伝達装置の変形例
を示す分解斜視図である。FIG. 5 is an exploded perspective view showing a modification of the driving force transmission device for the pickup roller.
【図６】駆動力伝達装置と一体のピックアップローラを
用いた給紙搬送装置の概念図である。FIG. 6 is a conceptual diagram of a sheet feeding and conveying device using a pickup roller integrated with a driving force transmitting device.
【図７】本発明に係る駆動力伝達装置をピックアップロ
ーラに適用した場合の用紙の給紙搬送の過程を示す説明
図である。FIG. 7 is an explanatory diagram showing a process of feeding and conveying a sheet when the driving force transmission device according to the present invention is applied to a pickup roller.
【図８】給紙部における用紙送り時の不具合を説明する
ための模式図である。FIG. 8 is a schematic diagram for explaining a problem at the time of feeding a sheet in a sheet feeding unit.
１ ピックアップローラ ２ フィードローラ ３ 分離パッド ４，６ 読み取りローラ ５，７ 加圧ローラ １０ 動力入力部 １１ 鍔部 １２ 円柱部 １３ 突起部 ２０ 動力伝達部 ２１ 係合溝 ２１ａ 駆動伝達面 ２１ｃ テーパ面 ２２ 係止爪 ３０ 動力出力部 ３１ ラチェット溝 DESCRIPTION OF SYMBOLS 1 Pickup roller 2 Feed roller 3 Separation pad 4, 6 Reading roller 5, 7 Pressure roller 10 Power input part 11 Flange part 12 Column part 13 Projection part 20 Power transmission part 21 Engagement groove 21a Drive transmission surface 21c Tapered surface 22 Stop claw 30 Power output part 31 Ratchet groove
Claims (4)
る給紙ローラの駆動力伝達装置において、 駆動側から動力を伝達されて回転する動力入力部と、 この動力入力部と同一軸線上に当該軸線を中心として回
動自在、かつ、前記軸線方向に移動自在に配置され、前
記動力入力部の回転駆動力を動力伝達方向下流側に伝達
する動力伝達部と、前記軸線上に配置され、前記 動力伝達部から伝達された
駆動力を前記給紙ローラ側に出力する動力出力部と、 前記動力入力部と前記動力伝達部との間に設けられ、前
記動力入力部の駆動方向の回転速度が前記動力伝達部の
回転速度よりも大きいときには、前記動力入力部の回転
駆動力を前記動力伝達部に伝達して前記動力伝達部を前
記動力入力部と同速度で回転させるとともに、前記動力
伝達部を接触圧により前記動力出力部側に移動させる第
１のカム手段と、 前記動力伝達部と前記動力出力部との間に設けられ、前
記動力伝達部の回転速度が前記動力出力部の回転速度よ
りも大きいときには、前記動力伝達部の回転駆動力を前
記動力出力部に伝達し、前記動力出力部の回転速度が前
記動力伝達部の回転速度よりも大きいときには、前記動
力伝達部を接触圧により前記動力入力部側に移動させて
前記動力出力部から離脱させる第２のカム手段と、 を備え、前記動力入力部、前記動力伝達部および前記動
力出力部の３部材で動力の伝達および伝達解除を行うこ
とを特徴とする給紙ローラの駆動力伝達装置。1. A driving force transmitting device for transmitting a sheet feeding driving force to a sheet feeding roller, comprising: a power input portion configured to rotate by receiving power from a driving side; and a shaft coaxial with the power input portion. Around the axis on the line
A power transmission unit disposed movably and movably in the axial direction to transmit the rotational driving force of the power input unit to a downstream side in a power transmission direction; and a power transmission unit disposed on the axis and transmitted from the power transmission unit. a power output unit for outputting the driving force to the paper feed roller side, provided between the power transmission unit and the power input unit, before
When the rotational speed of the driving direction of the serial power input portion is greater than the rotational speed of the power transmitting unit, the rotation of the power input unit
Before the power transmission unit to transmit the driving force to the power transmission unit
It is rotated in serial power input unit and the same speed, provided between the first cam means for moving the power transmission unit to the power output portion by the contact pressure, and the power transmission unit and the power output unit Before
When the rotational speed of the serial power transmission unit is larger Ri rotational speed by <br/> of the power output unit, before the rotation driving force of the power transmission unit
Transmitted to the serial power output unit, the rotational speed of the power output section is pre
Serial When greater than the rotational speed of the power transmission portion is moved by the contact pressure of the moving <br/> force transmitting portion to the power input side
A second cam means for detaching from the power output section , wherein the power input section, the power transmission section, and the
A driving force transmitting device for a paper feed roller , wherein power is transmitted and released by three members of a force output unit .
の外周部に形成された突部と、この突部が係合する前記
動力伝達部の端部に形成された溝部とからなり、この溝
部は、動力伝達時には前記突部が回転方向下流側の面に
当接し、非伝達時には回転方向上流側の面に退避するよ
うな形状に形成されていることを特徴とする請求項１記
載の給紙ローラの駆動力伝達装置。Wherein said first cam means includes a projection formed on an outer peripheral portion of the power input section, the projecting portion is formed at an end of the <br/> power transmission portion engaging A groove, which is formed in such a shape that the projection abuts on the surface on the downstream side in the rotational direction when power is transmitted and retreats on the surface on the upstream side in the rotational direction when power is not transmitted. The driving force transmitting device for a sheet feeding roller according to claim 1.
の反動力入力部側の端面に形成された突部と、この突部
が係合する前記動力出力部の端部に形成された溝部とか
らなり、前記突部と前記溝部とは、前記動力伝達部によ
って動力伝達が行われるときに係合し、前記動力出力部
の回転速度が前記動力伝達部の回転速度よりも大きく、
前記動力出力部が空転するときには係合関係を解除する
ような形状に形成されていることを特徴とする請求項１
記載の給紙ローラの駆動力伝達装置。Wherein said second cam means comprises a projection formed on the end surface of the recoil force input portion of the power transmission portion is formed at the end of the power output section which this projection is engaged was made groove portion, wherein the groove and the projection, said the power transmission portion engages when the power transmission is performed, the rotational speed of the power output section is greater than the rotational speed of the power transmission unit,
2. The power output portion is formed in a shape such that the engagement relationship is released when the power output portion idles.
A driving force transmission device for a paper feed roller according to claim 1.
用紙を呼び出すピックアップローラおよびこのピックア
ップローラの下流側近傍に設けられたフィードローラの
いずれかであることを特徴とする請求項１記載の給紙ロ
ーラの駆動力伝達装置。4. The paper feed roller according to claim 1, wherein the paper feed roller is one of a pickup roller for calling a sheet stacked on a paper feed unit and a feed roller provided near the downstream side of the pickup roller. A driving force transmission device for a paper feed roller according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19957693A JP3176488B2 (en) | 1993-08-11 | 1993-08-11 | Driving force transmission device for paper feed roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19957693A JP3176488B2 (en) | 1993-08-11 | 1993-08-11 | Driving force transmission device for paper feed roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0753069A JPH0753069A (en) | 1995-02-28 |
| JP3176488B2 true JP3176488B2 (en) | 2001-06-18 |
Family
ID=16410138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19957693A Expired - Lifetime JP3176488B2 (en) | 1993-08-11 | 1993-08-11 | Driving force transmission device for paper feed roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3176488B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102720173B1 (en) * | 2020-04-15 | 2024-10-22 | 몰렉스 엘엘씨 | Shielded connector assemblies with temperature and alignment controls |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3658906B2 (en) * | 1996-02-09 | 2005-06-15 | 村田機械株式会社 | Drive transmission mechanism |
| JP3457253B2 (en) * | 2000-04-27 | 2003-10-14 | 京セラミタ株式会社 | Fixing device |
| JP4049736B2 (en) * | 2003-11-28 | 2008-02-20 | 京セラミタ株式会社 | Image forming apparatus |
| JP5675547B2 (en) * | 2011-10-17 | 2015-02-25 | 京セラドキュメントソリューションズ株式会社 | Sheet conveying apparatus, and automatic document conveying apparatus and image forming apparatus provided with the same |
| JP6477539B2 (en) | 2016-02-25 | 2019-03-06 | 京セラドキュメントソリューションズ株式会社 | ROLLER DRIVE TRANSMISSION DEVICE, AUTOMATIC DOCUMENT CONVEYING DEVICE, AND IMAGE FORMING DEVICE HAVING THE SAME |
| JP6848192B2 (en) * | 2016-03-22 | 2021-03-24 | セイコーエプソン株式会社 | Media feeder, image reader, recording device |
| JP6312784B1 (en) * | 2016-12-19 | 2018-04-18 | 株式会社Pfu | Document feeder |
| JP2020193060A (en) * | 2019-05-27 | 2020-12-03 | コニカミノルタ株式会社 | Drive coupling device |
-
1993
- 1993-08-11 JP JP19957693A patent/JP3176488B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102720173B1 (en) * | 2020-04-15 | 2024-10-22 | 몰렉스 엘엘씨 | Shielded connector assemblies with temperature and alignment controls |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753069A (en) | 1995-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0059631B1 (en) | Improved paper feeding device and paper guiding device in a copying apparatus | |
| JP2521303B2 (en) | Automatic paper feeder | |
| JP3176488B2 (en) | Driving force transmission device for paper feed roller | |
| US5749570A (en) | Sheet conveying apparatus | |
| US5155603A (en) | Apparatus for transferring documents in a facsimile | |
| JP2005154119A (en) | Image forming device | |
| EP0668689B1 (en) | Sheet supply apparatus | |
| US5628503A (en) | Paper feeder | |
| JPS6297872A (en) | Paper-feeding mechanism | |
| JP3242168B2 (en) | Paper feeder | |
| KR0124607B1 (en) | Multiple paper feeding device for facsimile | |
| JP3658906B2 (en) | Drive transmission mechanism | |
| JP2619959B2 (en) | Paper feeder | |
| JPH04313528A (en) | Automatic paper sheet feeding device | |
| JP3463837B2 (en) | Paper feeder | |
| JP3459695B2 (en) | Sheet feeding device and image forming apparatus provided with the sheet feeding device | |
| JP3319941B2 (en) | Transfer material transfer device | |
| JP2537820B2 (en) | Automatic paper feeding device in image reading device | |
| JPH07285688A (en) | Paper feeding device for image forming device | |
| JP2022035808A (en) | Conveyance member, conveyance device, and image forming device | |
| JPS6047552A (en) | Facsimile equipment | |
| JP3652227B2 (en) | Transport roller drive mechanism | |
| JPS5924036Y2 (en) | Device for shifting the leading edge of two sheets of paper that are fed out in a superposed manner | |
| JPH1025048A (en) | Paper sheet conveyance device | |
| JP3321215B2 (en) | Automatic paper feeder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080406 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080406 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090406 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090406 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100406 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100406 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110406 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120406 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130406 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140406 Year of fee payment: 13 |
|
| EXPY | Cancellation because of completion of term |